S90.00A is the authoritative medical code for Contusion of unspecified ankle, initial encounter. This classification is used in medical billing and clinical recording to specify the clinical criteria for contusion of unspecified ankle, initial encounter (ICD-10-CM S90.00A), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Contusion of unspecified ankle, initial encounter is a billable ICD-10-CM diagnosis code S90.00A. Excludes2 (not included here): burns and corrosions T20-T32; fracture of ankle and malleolus S82.-; frostbite T33-T34; insect bite or sting, venomous T63.4. 7th character: The appropriate 7th character is to be added to each code from category S90.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S90.00A in the official ICD-10-CM tabular list.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burns and corrosions T20-T32
- fracture of ankle and malleolus S82.-
- frostbite T33-T34
- insect bite or sting, venomous T63.4
Frequently Asked Questions (FAQ) & Clinical Guidance
Does S90.00A require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S90.
Can S90.00A be reported alongside related conditions?
Per Excludes2 instructions, S90.00A and the following may both be reported when both are present: burns and corrosions (T20-T32); fracture of ankle and malleolus (S82.-); frostbite (T33-T34); insect bite or sting, venomous (T63.4).
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as S90.00A, with their registry titles.
- S90 — Superficial injury of ankle, foot and toes
- S90.0 — Contusion of ankle
- S90.00D — Contusion of unspecified ankle, subsequent encounter
- S90.00S — Contusion of unspecified ankle, sequela
- S90.01A — Contusion of right ankle, initial encounter
- S90.01D — Contusion of right ankle, subsequent encounter
- S90.01S — Contusion of right ankle, sequela
- S90.02A — Contusion of left ankle, initial encounter
- S90.02D — Contusion of left ankle, subsequent encounter
- S90.02S — Contusion of left ankle, sequela
- S90.1 — Contusion of toe without damage to nail
- S90.111 — Contusion of right great toe without damage to nail
- S90.111A — Contusion of right great toe without damage to nail, initial encounter
- S90.111D — Contusion of right great toe without damage to nail, subsequent encounter
- S90.111S — Contusion of right great toe without damage to nail, sequela
- S90.112 — Contusion of left great toe without damage to nail
- S90.112A — Contusion of left great toe without damage to nail, initial encounter
- S90.112D — Contusion of left great toe without damage to nail, subsequent encounter
- S90.112S — Contusion of left great toe without damage to nail, sequela
- S90.119 — Contusion of unspecified great toe without damage to nail
- S90.119A — Contusion of unspecified great toe without damage to nail, initial encounter
- S90.119D — Contusion of unspecified great toe without damage to nail, subsequent encounter
- S90.119S — Contusion of unspecified great toe without damage to nail, sequela
- S90.121 — Contusion of right lesser toe(s) without damage to nail
- S90.121A — Contusion of right lesser toe(s) without damage to nail, initial encounter
- S90.121D — Contusion of right lesser toe(s) without damage to nail, subsequent encounter
- S90.121S — Contusion of right lesser toe(s) without damage to nail, sequela
- S90.122 — Contusion of left lesser toe(s) without damage to nail
- S90.122A — Contusion of left lesser toe(s) without damage to nail, initial encounter
- S90.122D — Contusion of left lesser toe(s) without damage to nail, subsequent encounter
- S90.122S — Contusion of left lesser toe(s) without damage to nail, sequela
- S90.129 — Contusion of unspecified lesser toe(s) without damage to nail
- S90.129A — Contusion of unspecified lesser toe(s) without damage to nail, initial encounter
- S90.129D — Contusion of unspecified lesser toe(s) without damage to nail, subsequent encounter
- S90.129S — Contusion of unspecified lesser toe(s) without damage to nail, sequela
- S90.2 — Contusion of toe with damage to nail
- S90.211 — Contusion of right great toe with damage to nail
- S90.211A — Contusion of right great toe with damage to nail, initial encounter
- S90.211D — Contusion of right great toe with damage to nail, subsequent encounter
- S90.211S — Contusion of right great toe with damage to nail, sequela
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code S94.00A
Injury of lateral plantar nerve, unspecified leg, initial encounter